Creating a Floor plan, Footing detail and Isometric view using AutoCad
Aim: To draw the given drawings using Autocad 2023
Introduction: Autocad is a commercial Computer Aided Design(CAD), It is marked and developed as Autodesk. It was first released on december 1982. Autocad derived from a program, which was beganed in 1977 and then released in 1979 called as Interact CAD, and also called in early documents od autocad as microCAD, Auto desk cofounder was Michael Riddle.
The first version of cad was released in december 1982 and was supported on CP/M-80 computers, By march 1986 Aotocad has became most uniquitous cad program worldwide. The file format of autocad was .dwg, and its interchange file format to DXF, have become a standard. Autocad was included support for .dwf, a format developed and promoted by Autodesk, for publishing CAD date. In year 2022 the Autocad 36th major version was released and the 12th consecutive year of Autocad foe Mac.
CAD is a technology which replaces manual drawing with automated process, if you are a drafter, desingner, architect or engineer you have been used 2D or 3D CAD programs i.e., Autocad or Autocad LT software. Autocad helps you in draft construction documentation, explore ideas for design, viaualise concepts through photorealistic renderings and gives how a design performs in real world.
Autocad mailnly used by industries, architects, engineers, city planners, project managers, graphic designers and other professionals.
Cross section of load bearing wall under spread footing:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and grid ON snap and grid, give snap X and Y spacing as 0.1, and Grid X and Y spacing as 0.1 and major lines are taken at every 5 minor lines.
- Take line command, first point is (0,0) and the next points are (@0.9,0) (@0,0.25) (@-0.9,0) and the close
- Now draw a reference line from (0.45,0) to (0.45,2.7)
- Now offset the ref line at a distance of 0.25 on either sides, again offset at a distance of 0.2 on either side of ref line and again distance of 0.15 offset on both sides is done.
- Now horizontal line of 0.9 length is selected and offset at a distance of 0.4, 0.4, 0.6, 0.05 and 1 in upward direction
- Now using trim remove all the unnecessary lines.
- From ground level or above the footing a line in -X direction is drawn using direct distance method of length 1.15, and then in -Y give 0.15 and in X direction 1.15
- Now from top left corner draw line 0.3 in X direction and the 0.15 in Y direction and again 0.3 in X, now copy the step and place it two times.
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.
C.S of Isolated Footing:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and grid ON snap and grid, give snap X and Y spacing as 0.1, and Grid X and Y spacing as 0.1 and major lines are taken at every 5 minor lines.
- Take line command, first point is (0,0) and the next points are (@1,0) (@0,0.15) (@-0.38,0.25) (@0,1.6) (@-0.24,0) (@0,-1.6) (@-0.38,-0.25) (@0,-0.15)
- Now draw the reference line from (0.5,0) to (0.5,2)
- By using offset the ref line on both sides at a distance of 0.08, now offset the bottom vertical line of length 0.15 and bottom horizontal line at a distance of 0.04
- By using line join the top most points of offseted line from ref line and that horizontal line is offseted at a distance of 0.2 in -Y direction for 9 times
- Now by using trim remove all the unnecessary lines and also remove reference line.
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.
Line diagram of a two bedroom building:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and grid ON snap and grid, give snap X and Y spacing as 0.1, and Grid X and Y spacing as 0.1 and major lines are taken at every 5 minor lines.
- Take line command, first point is (0,0) and the next points are (@0,-0.9) (@1,0) (@0,0.9) (@4.2,0) (@0,3.6) (@-4.2,0) (@0,0.9) (@-1,0) (@0,-0.9) (@-3.6,0) (@0,-3.6) (@3.6,0)
- Draw line from (0,0) to (0,0.9) and another line from (0,3.6) 1.8units in -Y direction
- The bottom most horizontal line of 1 meter length is offseted at a distance of 0.3 inward direction for twotimes, similarly offset the upper horizontal lines
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.
C.S of Load Bearing wall:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and grid ON snap and grid, give snap X and Y spacing as 0.1, and Grid X and Y spacing as 0.1 and major lines are taken at every 5 minor lines.
- Take line command, first point is (0,0) and the next point is (0.9,0) and reference line from (0.45,0) to (0.45,2.75)
- Offset the ref line at a distance of 0.45 on both sides, again offset the ref line on both sides at a distances of 0.3, 0.25, 0.2 and 0.15
- Now the offset the bottom horizontal line of 0.9 length in +Y direction at a distances of 0.45, 0.4, 0.3, 0.6 and 1
- By using trim, remove the unnecessary lines to get required diagram
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.
Isometric view of steps:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and off and goto Snap type and select Isometric snap and on Ortho
- At the bottom, goto settings and on 3D Modelling
- Goto Isometric Drafting and on Isometric Left, take Line command and first point as (0,0,0) and by using direct distance method draw 1unit in horizontal and 0.15 upwards and again 1unit right side and 0.15 downward
- Now select Isometric Top, and draw 0.3 from corners in right direction and then join top 0.3 lines i.e., 1 unit length, so one step is created
- Now take copy command and select the step and use array, No.of objects= take 5 and then select base point and place
- Now select Isometric right, Draw 0.15unit down from top step and ortho off and join first step and top step.
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.
Isometric view of Gable Wall:

Steps:
- Open new file in Autocad 2023, Type UNITS, use decimal and take meters
- Then LIMITS, Limits of lower left corner give (0,0) and limits of upper right corner (10,10)
- Type DS (drafting settings) and go to snap and off and goto Snap type and select Isometric snap and on Ortho
- At the bottom, goto settings and on 3D Modelling
- Goto Isometric Drafting and on Isometric right, take Line command and first point as (0,0,0) and by using direct distance 1unit right side and 2.42 upward and again 1 unit right and 2.42 downward, and 1 unit right then 3units upward.
- Now draw reference line from (0,0) to 1.5 right and 3.25 upward.
- Use line command, and Off Ortho and join 3 unit and 3.25 unit vertical lines and now from (0,0) draw 3unit vertical line and join with ref line 3.25unit
- Now select Isometric Left, and draw line of 0.3 from corners towards left and join the lines
- Then using Dimension mark the lines dimension, To modify dimensions- Go to dimenstion in tool bar and then to dimension style.